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-rw-r--r--include/linux/mm_types.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 332cee285662..7490d84af310 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -438,7 +438,9 @@ FOLIO_MATCH(compound_head, _head_2a);
* struct ptdesc - Memory descriptor for page tables.
* @__page_flags: Same as page flags. Powerpc only.
* @pt_rcu_head: For freeing page table pages.
- * @pt_list: List of used page tables. Used for s390 and x86.
+ * @pt_list: List of used page tables. Used for s390 gmap shadow pages
+ * (which are not linked into the user page tables) and x86
+ * pgds.
* @_pt_pad_1: Padding that aliases with page's compound head.
* @pmd_huge_pte: Protected by ptdesc->ptl, used for THPs.
* @__page_mapping: Aliases with page->mapping. Unused for page tables.